Patents by Inventor Robin G. Hall

Robin G. Hall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5610131
    Abstract: A process for making a granular laundry detergent component or composition having a bulk density of at least 650 g/l, comprises dissolving a structuring agent in a nonionic surfactant, said structuring agent comprising a polymer, to form a pumpable premix and finely dispersing said premix with an effective amount of powder at a given operating temperature wherein the premix has a viscosity of at least 350 mPas when measured at said operating temperature and at a shear rate of 25s-.sup.1. Preferred structurants comprise polymers having more than one functional hydroxyl group, especially polyvinyl alcohols, polyhydroxyacrylic acid polymers, and polymers such as polyvinyl pyrrolidone and PVNO, as well as sugars, artificial sweeteners and their derivatives. The premix is then processed into a granular detergent by any suitable process. Fine dispersion mixing, agglomeration, or spraying the premix onto a granular base product are preferred.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: March 11, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Scott J. Donoghue, Kay E. Fitzgibbon, Paul A. R. G. France, Robin G. Hall, Carole P. D. Wilkinson, David W. York, John C. Schmitt
  • Patent number: 5470510
    Abstract: Poly(glutamic acid) is used as a dispersing, soil-suspending or anti-redeposition agent in laundry detergent or other cleaning compositions that also contain a detersive surfactant. Suitable polymers include not only the homopolymers of glutamic acid but also block, graft or random copolymers of glutamic acid with biodegradable monomers or polymers, e.g., other amino acids or polyethylene glycol.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: November 28, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Alan D. Willey, Robin G. Hall
  • Patent number: 5415807
    Abstract: Anionic sulfonated poly-ethoxy/propoxy, especially modified isethionate, end-capped esters useful as soil release agents in detergent compositions are presented. The terephthalate esters are homogeneously integrated with one or more crystallization-reducing stabilizers.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: May 16, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Eugene P. Gosselink, Robert Y. Pan, Patti J. Kellett, Robin G. Hall